IRVING — Ahmed Mohamed — who makes his own radios and repairs his own go-kart — hoped to impress his teachers when he brought a homemade clock to MacArthur High on Monday.

Instead, the school phoned police about Ahmed’s circuit-stuffed pencil case.

So the 14-year-old missed the student council meeting and took a trip in handcuffs to juvenile detention. His clock now sits in an evidence room. Police say they may yet charge him with making a hoax bomb — though they acknowledge he told everyone who would listen that it’s a clock.

In the meantime, Ahmed’s been suspended, his father is upset and the Council on American-Islamic Relations is once again eyeing claims of Islamophobia in Irving.